Improvement in roller-dies



'2 Sheqts-Sheetl. G. W'. WICKS.

ROLLER DIE Patented June Z7, 1865.

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10,423,472 'Patented m4116271 1865.

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y the utmost care and skill in forming the teethimpartir] g motion'to the rolls are rendered selfdinary construction withoutfbeing bent and PATENT OFFICE.

GEORGE W.' WICKS, OF BROOKLYN,NEW YORK.

IMPROVEMENT IN 'ROLLER-DIES.

Specification forming part of Letters Patent No. 48,472, d ated June 27, 1865..

To all 'whom *it 'may concern: Y n

Beit known that I, GEORGE W. WIcKs, of Brooklyn, Kings county, State of New York, have invented a new and useful Improvement in Rolling-Mills;` and Ido hereby declare that the following is a full, clear, and exact description of the same, reference, being had to the accompanying drawings, making a part et this specification. A e

V My improved rolling-mill for the use of lsil-4 versmiths and others is distinguished from similar machines which have preceded it in the important particular that motion is imparted to, the rolls by the use of worm-gear, the advantages of which I shall presently set forth.- .e A

An incidental peculiarity of my machine, arising from the use of worm-gear; is a very delicate and exact mod'e ofadjusting or regulating the rolls in the exact relation to each other necessary to produce a perfect result in rolling a blank which is to be impressed with Silversmiths,'rolls as constructed previous to the date of my invention have been made to revolve by the actiouof ordinary' spurwheels, and notwithstanding the exertion of or cogs upon these wheels the practical result in using them has been an unstead yor slightly intermittent. motion, the eli'cct of which is shown upon the object passed through the rolls by the production upon it of waving or undulating surfaces. It has therefore been necessary to shave or polish oft" these irregularities,which cannot be done withoutin many cases injuring the device impressed upon the metal. y

With this explanation of the difficulties and imperfections characterizing this branch ,of manufacturethe advantages of worm-gear for evident, forit will be at once understood that the motion thus obtained is smooth and undeviating, and in practice it will be found thata strip of metala spoon-blanlnfor examplewill come through my rolls straight and iiat, while it .cannot be passed through rolls of orourved in several directions. The necessity 4for Shaving the surface is thus substantially avoided, and the 'beauty of the device or pattern remains unimpaired.

A full set of working drawings accompanies l section through line fr, Figs. 1 and 2.

Similar letters of reference indicate corresponding parts in all the drawings.

I construct and mount myrollsin the usual Way, upon a bench, a, having two uprights,'a and a, with the ordinary sliding boxes, a3, held in place by the set-screws a4. The drivingshaft b carries the ruiter-gear b', this imnart-= ing motion to the counter-shaft b2, which is .provided with a pinion, b3, meshing into "the wheels b4 and b5 upon the end'of the wormshafts c and d. meshes into the worm-pinion C on the shaft of the lower roll, c2, while the thread upon theshaft d meshes into the worm-pinion d on shaft of the upper roll, d2. The shaft dis movable endwise, and its position is regulated by 'the set-screws cl3 and d4, by which means the upper; roll, d2, is susceptible of the utmost nicety of adjustment-a feature of which, as will be obvious, is entirely wanting in the case of rolls operated by spur-gear.

It is to be observed that the interposition of the counter-shaft b2 makes it necessary to cut the threads upon the worm-shafts in opposite directions, in order to communicate the proper direction to the rolls, which would otherwise, of course, both rotate the same way.

Doubtless other modes of applying the principles of my invention will readily suggest themselves, and I desire to say that I have adopted this particular plan merely as a matter of convenience in aworking machine which I have recently built, but do not confine myself to it iu all particulars. In cases Where very delicate and elaborate figures or' devices are engraved upon the rolls I havethought it may possibly be found useful, by way of obtaining still more smooth and perfect motion, to rotate the shafts c and al by means of wormgear upon the driving-shaft b,`setting that at The thread upon the shaft c' the proper angle, and arranging the worm-pinion upon the adjustable shaft d, sc that the shaft may slide through it,-'as will be easily understood by the skillful mechanic; but the perfection of the product of my present inachine is so great that I do not apprehend any necessity for carrying ont the principle to the extent alluded to.

What I claim as my own lnvention, and desire 'to secure by Letters Patent of the United States, is-

The combination of the rolls with an adjustable worm-shaft, arranged substantially as specified, and for the purposes set forth.

, GEO. W. WICKS.

Witnesses: g

CHARLES E. WEST, L. PITKIN. 

